Armageddon, Part 5

S8 E5: The exciting conclusion to the five-part Armageddon event presents an opportunity for The Flash to end his lifelong battle with Reverse Flash (Tom Cavanagh) for good, but the payoff could be too much for Barry and the team to handle. Meanwhile, Mia Queen (guest star Katherine McNamara) drops in from the future looking to save a lost one… and won’t let anything stand in her way.